Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
INTEREST INCOME
Interest and fees on loans and leases	$ 223,470	$ 235,174	$ 444,611	$ 481,167
Interest and dividends on investment securities:
Taxable	14,619	9,015	27,731	25,620
Exempt from federal income tax	1,487	1,520	3,021	3,082
Dividends	405	568	1,003	1,246
Interest on temporary investments and interest bearing deposits	774	403	1,398	3,734
Total interest income	240,755	246,680	477,764	514,849
INTEREST EXPENSE
Interest on deposits	7,016	26,222	17,694	66,512
Interest on securities sold under agreement to repurchase and federal funds purchased	68	194	144	589
Interest on borrowings	866	3,839	2,638	7,885
Interest on junior subordinated debentures	3,042	3,922	6,094	8,825
Total interest expense	10,992	34,177	26,570	83,811
Net interest income	229,763	212,503	451,194	431,038
(RECAPTURE) PROVISION FOR CREDIT LOSSES	(22,996)	87,085	(22,996)	205,170
Net interest income after (recapture) provision for credit losses	252,759	125,418	474,190	225,868
NON-INTEREST INCOME
Residential mortgage banking revenue, net	44,443	83,877	109,476	101,417
Gain on sale of debt securities, net	0	323	4	190
Gain (loss) on equity securities, net	4	240	(702)	1,054
Gain on loan and lease sales, net	5,318	1,074	6,691	2,241
Bank owned life insurance income	2,092	2,116	4,163	4,245
Total non-interest income	91,075	115,480	199,875	156,125
NON-INTEREST EXPENSE
Salaries and employee benefits	121,573	116,676	245,707	226,450
Occupancy and equipment, net	34,657	36,171	69,292	73,172
Communications	3,004	2,939	5,767	6,067
Marketing	2,054	1,759	3,426	4,289
Services	13,512	10,356	24,262	21,126
FDIC assessments	1,607	3,971	4,206	6,513
Intangible amortization	1,130	1,246	2,260	2,493
Goodwill impairment	0	0	0	1,784,936
Other expenses	11,863	8,792	22,072	19,522
Total non-interest expense	189,400	181,910	376,992	2,144,568
Income (loss) before provision for income taxes	154,434	58,988	297,073	(1,762,575)
Provision for income taxes	38,291	6,062	73,193	36,446
Net income (loss)	$ 116,143	$ 52,926	$ 223,880	$ (1,799,021)
Earnings (loss) per common share:
Basic (in dollars per share)	$ 0.53	$ 0.24	$ 1.02	$ (8.17)
Diluted (in dollars per share)	$ 0.53	$ 0.24	$ 1.01	$ (8.17)
Weighted average number of common shares outstanding:
Basic (in shares)	220,593	220,210	220,481	220,213
Diluted (in shares)	221,022	220,320	220,928	220,213
Service charges on deposits
NON-INTEREST INCOME
Revenue from contract with customer	$ 10,310	$ 8,757	$ 19,957	$ 20,230
Card-based Fees
NON-INTEREST INCOME
Revenue from contract with customer	10,274	5,901	17,648	13,318
Brokerage revenue
NON-INTEREST INCOME
Revenue from contract with customer	1,135	3,805	5,050	7,820
Other income
NON-INTEREST INCOME
Revenue from contract with customer	$ 17,499	$ 9,387	$ 37,588	$ 5,610